Drawing machine



A. c. BELLES 1,765,047

DRAWING MACHINE Filed Sept. 8, 1926 3 Sheets-Sheet l www,

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June 17, 1930. A. c. BELLES DRAWING MACHINE Filed sept. s, 1926 3Sheets-.Sheet 2 INVENTOR June 17, 1930. A. c. BELLES 1,765,047 DRAWINGMACHINE Filed Sept. 8, 1925 3 sheets-Sheet 3 R O T N E V N l PatentedJune 1 7, 1930 UNITED 'STATES PATENT OFFICE ALBT 0. BELLES, 0F NEWBRIGHTON, PENNSYLVANIA ASBIGNOB T0 'UNION DRAWN STEEL COMPANY, 0l'BEAVER FALLS, PENNSYLVANIA, A CORPORATION 0I' PENN- SYLVANIA DRAWINGMACHINE Application nled September 8, 1926. Serial No. 134,178.

v 4 The present invention relates broadly to metal working machines andmore particularly to machines of this character suitable for the drawingof metallic rods, bars or other shapes as well understood in the art.

At the present time it is customary in the art to which the presentinvention relates to provide drawing machines of a number of ifferenttypes, a large number of commercial machines embodying a draw chaincontinuousl travelling in the same direction. I have ound thatconstructions embodying chains are objectionable from a number ofstandpoints which it is one lof the objects of the present invention toovercome.

With most chain installations a consider- 'able amount of floor space isrequired and the capacity of such machines limited. The

chains develop slack during use, and even when tight have a slighttendency to buckle or kink when subjected to the drawing load. Withcarriages as ordinarily utilized this buckling has not infrequentlyresulted in nonuniform drawing and die wear. The present inventionprovides a machine occupying a minimum amount of floor space andeffective for uniformly drawing articles.

Another object of the present invention is to provide a drawing machineof maximum capacity, effective for drawing 1n opposite directions. Whileit has hereto o posedto provide reversible chain installations whereinthe carriage controls the reversal of the parts, such machines have notbeen altogether satisfactory due not only to the inherent objections tothe use of a chain, but also because of the necessity with a givensetting of the apparatus of drawing only articles having substantiallythe same length. In accordance with the present invention the travel ofthe carriage is variable throughout the capacity of the machine, thevcontrol thereof being effected by an operator carried by the carriage soas to be able at all times to carefully watch and control its operation.f

A further object of the invention is to provided a self propelleddrawing carriage, positively guided, movable in opposite directions, andincluding an operators platform.

re been prodefine the limits of my invention, as changes in theconstruction and operation disclosed therein may be made withoutdeparting either from the spirit of my invention or the scope of mybroader claims.

In the drawings: Figure 1 is a diagrammatic side elevational view of adrawing machine installation embogying the invention;

igure 2 is a side elevational view, on an enlarged scale and partlybroken away, of the drawing machine itself;

V Figure 3 is a top plan view of a portion of the drawing machineshowing the carriage and its associated parts, the motor being indicatedin outline only; v

Fi ure 4 is a transverse lsectional view on the llne-IV-IV of Figure 1looking in the direction of the arrows;

Figure 5 is a transverse sectional view on the line V-V of Figure 2looking inthe direction of the arrows; and

Figure 6 is a transverse sectional view on the line VI-VI of Figure2looking in the direction of the arrows.

In carrying out the present invention there may be rovided a suitablesupporting frame of any esired construction, preferably comprising sidemembers 2 tied together adjacent the ends only by transverse braces 3 asshown in Figures 5 and 6. This leaves the space between the side memberssubstantially unobstructed throughout the length of the machine, therebyfacilitating the discharge of the drawn articles as will be hereinaftermore fully described.

Adjacent the upper edges of the side members the are provided withinwardly projecting an es.4 below which there are received rack ars 5.Mounted upon the upper supporting rails 6.

' Adapted to travel between the side members on the rails 6 is acarriage 7 having bearings 8 adjacent each 9 carr ing the flangedsupporting and guiding w eels 10. At its.intermediate portion thecarriage is provided with bearings 11 for a shaft 12, this shaft havingsecured to one end thereof a gear 13 with which meshes the pinion 14 onthe armature shaft of a driving motor 15. On its opposite end the shaft12 carries a gear 16 meshing with a similar gear 17 on anintermediateshaft 18 journaled 1n bearings 19.\ This intermediate shaft carries agear 20 meshing with a gear 21 onthe pinion shaft 22. The pinion shaftextends transversely of the carriage and through the sides thereof insuch manner that its ends underlie the rack bars 5, the ends carryingpinions 23 which continuously mesh with the teeth of the rack bars.

' It will be -apparent to those skilled in the art that the motor 15 isitself mounted directly on the carriage `7 so that the carriage consti-4 tutes aself propelled unit. Such a construction has been found highlydesirable as it makes it unnecessary to provide lany projecting powershafts or driving pulleys which not only require considerable room butalso materially increase the hazards incident to operation.y Thecarriage also supports an operatoris platform 24 preferably suspended atone side of the carriage on suitable brackets 25..- These brackets mayeach be provided with a guide roller 26 adapted to cooperate with a rail27 extending lengthwise of one of the side members for giving increasedrigidity to the platform during its travel.

Conveniently located relative to the platform is a controller 28connected to the motor l5 in known manner, and receiving current frompower cables 29 through contact l shoes 30. This construction enables anoperator to travel continuously with the carriage and control itsoperations whereby the amount of travel and the direction thereof may bevaried at will.

Since a reversible carriage is desired, a direct current reversible milltype motor is preferably used, as this obviates the necessity of anyspecial reversing earing. Each end of the carriage is provi ed with agripper 31 of suitable construction in substantially the plane of theracks and having the respective pairs of gripping jaws 32 so located asto extendin accurate alinement with the dies 33 in die blocks 34 eachend of the machine frame. By reason of this construction the carriage iseffective upon movement in one direction for drawing articles throughone set of dies, the operator being in complete control throughout ofthe carriage movement. In the opposite direction the carriage drawsarticles through the dies in the die block on the o posite end of themachine. The accuracy o alinement beend for the axle shafts one of whichis secured tov of travel, or by machinesvin which the carriage has notbeen so supported and guided as to prevent any'possi ility of deviation:from a predetermined pathl of travel.

The gripper 31 is preferably maintained against lateral motion bysuitable guiding portions G. Drawing force is preferably transmitted tothe gripper 31 by a yielding connection which absorbs the shocksincidental to starting and sto ping the draw. Suitable studs S passing trough a cross member M secured to the carriage 7, are fastened to thegripper 31, and yieldingly secure the gripper 31 to the member-M throughopposed coil springs C which encircle the studs S. Nuts N at the outerends of the studs may be used to apply sutlicient compressive force tothe opposed springs to hold the nuts N free of the member M, t ere ypermitting motion of the gripper 31 in either direction relative to themember M. Thus I ip er and provide for absorbing longitudinal shockswhich may arise when starting or terminating the draw.

As clearly illustrated in Figures 1 and 4 of the drawings, the sidemembers are preferably supported on piers 35 located adjacent oppositeends of at least one of the side members to provide an unobstructeddischarge opening 36 between the piers and below such side member.Formed adjacent the machine l Itis desirable from a practical standpointtoeven up or equalize the ends of the drawn articles. As the pitprovides effective supporting and alining means for the articles, Ipreferably provide a ram 39 adjacent one end of the machine and in linewith the pit, the ram being' operated in any convenient manner as by aHuid pressure cylinder 40.

The ram may be periodically operated to engage the ends of the articlesand properly position the same with respect to lengthwise projection. I

Certain advantages of the present machine arise from the provision of adrawing machine having a self propelled carriage, and in line with a diewhenheld by the die supparticularly from a carria e of this typesupporting an operators plat orm. A

Other advantages of the invention arise from the use of a reversibledrawing means, preferably in the form of a self propelled carriage,soguided that deliectionfrom a predetermined accurate path o'f travel ismade impossible. By reason of such a construction the capacity of themachine is increased as an idle between is not necessai` and the qualityof the articles is improve and absolute uniformity together with uniformdie wear is insured..

Further advantages arise from the construction of the machine and mannerof supporting the same whereby drawn articles may be easily dischargedtherefrom and laterally relatively thereto.

Still further advantages of the invention arise from the provision ofmeans for evening up-or equalizing the ends of the drawn articles. v

I claim:

1.` In adrawing machine, a supporting frame having two parallel sidemembers, transverse brace members connecting lthe side members to eachother and spaced apart a distance equal to the len th of the longestarticle to be drawn, a gui e on the upper portion of each of the sidemembers., a rack on exterior of the carriage and below the racks,

each of said gears meshing with the teeth of one of the racks, a `motoron the carrage,

gearing connecting the 4motor and said shaft formoving the carriage, adie support -connected to the side members of the frame in`substantially the plane of the racks, and a gripper on the carriage inline with a. die when mounted in the die support.

2. In a drawing` machine, a supporting frame having two arallel sidemembers, transverse brace mem rs connecting the side members to eachvother and spaced apart a distance equal to the len h of the longest ar.-1

porting'means. Intestimony w my hand.

' ticle to be drawn, a gui e on the upper portion of each of the sidemembers, piers for supporting one of the `side members, said piers beingspaced'apart adistance ual `to the length of the longest article to berawn, a carriage supported on the guides, a rack on each side memberparallel with and below the guides, a transverse shaft on the carriage,gearson the shaft below the racks meshing with the racks, a motor on thecarriage, geary ing connecting the shaft and motor, means vforsupporting a die on the frame between the side membersin substantiallthe planev hereof I have hereunto set ALBERT C. BELLES.

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